Machine for making millboard.



No. 832,927. PATENTED OCT. 9, 1906.

. w. SILLMAN.

MACHINE FOR MAKING MILLBOARD.

APPLICATION FILED APR-11. 1906.

2 SHEETS-SHEET 1.

wi/twcmeo 8'14 we when 7;; WM 8% No. 832,927. PATENTED OCT. 9, 1906.

W. SILLMAN.

MACHINE FOR MAKING MILLBOARD.

APPLICATION FILED APR-11.1906.

2 SHEETS-SHEET 2.

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.iplgactically compelling all of the heavier and -vention is illustrated in two sheets of drawings, in which WILLIAM SILLMAN, OF NEW YORK, N. Y.

MACHINE FOR MAKING MILLBOARD.

No. 832,927. Patented Oct. 9, 1906.

Specification of Letters Patent. Application filed April 11, 1906. Serial 1%. 311.076.

Ton/ll whom it may concern;-

Be it known that I, WILLIAM SILLMAN, a trolled by the adjusting-lever 18. citizen of the United States of America, and a 23 23, &c., are suction-boxes of any conresident of the borough of Brooklyn, county venient form, over which the felt 2 passes. of Kings, city and State of New York, have The suction may be produced by steam-jets, invented certain new and useful ImprOvel blowers, or in any convenient manner. ments in Machines for Making Millboard, of I here illustrated.) The felt 2 is properly which the following is a specification. I l guided with reference to these suction-boxes My invention relates generally to the manul by the adjustable roll 5, the position of which facture of plates, sheets, or boards out of is controlled by the screw 21, operated by the pulp-like mixtures, and more specifically coni hand-wheel shaft 22. sists of improved mechanism for economic- 6 is a tightening-roll for the endless band ally handling mixtures containing ingrediof felt, the position of 'which is controlled by ents of great fineness of pulverization and the screw 19 and the hand-wheel 20.

to the beater, the

position of which is conconsiderable specific gravity. 7 is a lower press-roll mounted in station- Heretofore it has been customary to emary journal-bearings 8, and 9 the u per pressploy a paratus of the general paper-making roll, mounted in movable journa -bearings or car board-making machine type known in the art as fwet machines for the purpose of making millboard and heavier plates or sheets out of various pulped fibrous materials, including short asbestos fibers mixed with various pulverized materials as fillers and as active constituents in the composition. When 'a material which is finely ulverized, such as hydraulic cement, andw ich has considerable specific ravity, is employed in large quantity in sue 1 manufacture, the same is wasted in large part by being drawn through the meshes of the wire-cloth-covered roll, upon which the pulp material is originally eposited by the action of suction and 10, carried by the lever 13, pivoted to the main frame at 14 and pulled downward by the link 15, which is connected to the weighted pressure-lever 16.

11 is a screw for limiting the downward motion of the upper press-roll 9 by means of the adjustable hand-wheel nut 12. The endlessfelt of course passes between the pressrolls, as shown.

37' is the lower drying-roll for the felt, mounted in stationary journal-bearings 38, and 39 is the upper drying roll, mounted in j ournal-bearings 40 in the lever 42, ivoted to the main frame at 43 and pressed ownward ing these drying rofis the felt is further cleansed by the water-spray 59. V

24 is a mixing-box to which one portion of the stock or material, such as asbestos fiber beaten up with a sufficient quantity of water, is delivered through the stock-pipe 25.

26 is a water-pipe through w cha suitable quantity of.water is delivered;

46 is a passa eleading from the mixing box to the distri uting-trough 47. This passage is controlled by a gate 48. The trough 47 has a curved bottom, as shown in crosssection. 4 27 is an agitator I located in the distributing -'trough.- shown, it consists of a horizontal shaft withai series of beater-arms, the shaft being rotated by a power-belt 41 or any other convenient means. which isnextf' the agitator has a horizontal delivery-slot 28 formed therein at a height. a proximately correspondin to the axis of t e a itator 27. 29 is an ad ustable gate for said 8 0t.

in the bottom of the tank of the wet machine by virtue of its greater specific gravity. My

invention overcomes this feature of Waste by ely-divided constituent of the mixture to enter into the finished product and has other advantages and economies to be hereinafter- One form of apparatus embodying my inthe accompanying 'Figures 1 1" re resent a side elevation and artial section of the machine, the section being taken on line 1 1 of Fig. 2; and Fig. 2 is a detail plan view of one mixing-box and connections and spreading-roller.

Throughout the drawings like referencefigures indicate like parts. r

1 1 represent parts of the main frame of the machine, and 2 is an endless band of felt running over a series of guide-rollers 3 3, &c. 17 is a beater for cleaning said felt, 4 an adj u.s ting-roll for guiding the felt in proper relation by the adjustable wei ht 44. Before enterof anyconvenient form journal-bearings,

)With both at their juncture.

P mp

30 is an inclined a ron, of oil-cloth or simi lar material, exten in from the edgeof the distributing-trough, be ow the slot 28, down to a point over the upper strand of the endgelss felt 2. I This apron has upturned sides 32 is a regulating-roll having a face of rubber or similar suitable material, mounted in which can be adjusted toward or' away from the felt 2 by means of the adjusting-screw 33. This roll may cooperate the felt 2 or with the apron 30 or with It is rotated by the belt 34 in the direction to produce circumferenti'al travel on its under side opposite to the travel of the felt at the point of contact therewith, or opposite to the direction of flow o the material down to the apron 30.

35 is an overflowpipe from the mixingtank, and 36 is a artition which permits anyv materia to flow over into the com excess of artment 45, which serves as an overflowbox and which is drained by the overflowpipe 35.

z 49 is a stock-chest, from which the fiberpulp is drawn by any suitable means, as the through pipe 51, and delivered to stock-pi e 25. The overflow-pipe 35 returns the surp us pul to this stock-chest.

- 52 is a secon distributing-trough to which the cement mixture is while additional water is An agitator 55 is located supplied by pipe 54'. in this trough and rotated by any suitable means.

56 is a slot through which the diluted cement solution flows down the a ron 57 to the roll 32. The slot 56 is contro led by the gate 58.

' The operation of my invention is as follows: The ide-roller system and the endless band of felt 2 carried thereby being set inmod the tion by means of power (not shown) an supply of pulp-stock and water being turned on to the m1X1I1g-.-b0X the same will overflow through the slot 28 man even stream down the inclined apron 30 to the upper strand of the endless felt 2, upon which it will be deeven layer or film by means of the action of the regulating-roll 32 and the traveling motion of the felt. In the same way a thin sheet of film of dilute cement flows down the apron 57 onto roll 32 and is deposited on the previously-described ulp layer or m. A compound layer of cement and pulp is thus formed on the felt 2, and as this passes over the suction-boxes 23 23, &c., a considerable quantity of the water or .otherliquid is suckeddown throughthe posited in a thin .felt and the layer of material on the felt is left in a sufficiently dry condition to adhere to. the upper press-roll 9 as the feltpasses through said press-rolls. usually made of iron. therefore wound upon the upper press-roll 9, the same rising as the thickness of the delivered by pip I employed on the upper This press-roll 1s A film of material is winding on its surface increases until a predetermined thickness is attained, when the cylindrical covering thus formed is slit longitudinally of the cylinder by a knife in the hands of the operator and removed in the shape of a plate or sheet whose width'is the length of the cylinder and Whose length is the circumference thereof. The felt, from which the major portion of the material has thus been removed, passes on down around the guide-rolls 4 and up by the beater 17, which knocks out of the felt the small qu'antityof material remaining therein. The felt then passes between the drying-rolls 37 39, which squeeze the moisture out of it, and thence around the tightening-roll 6 back to f .the neighborhood of the mixing-tank, where it again has deposited upon it the film of material.

The advantages of my invention comprise the practically complete saving of all waste of material, there bein no'opportunity for any of the cement or ot er substance to escape deposition upon the felt 2, the prolonged life of the felt itself, which is not forced into destructive contact with the Wire-cloth roll used in former machines, the ease of regulation of the raw materials and machine and process at every point of operation, the possibility of cleaning and drying the felt, &c. I

It is evident of course that various changes could be made in the relative arrangement and form of the parts of my invention without departing from the spirit and scope thereof so long as the eneral principle of operation above set fort be adhered to.

-I-Iaving therefore described my invention, I claim 1. In a machine for making millboard and similar substances, the combination of a pair of press-rolls, a series of suction-boxes, an endless band of felt passing over said suction-boxes and through said rolls and means for initially depositing the materials to be sectionof said endless felt.

2. In a machine for making millboard and similar substances, the combination of a pair of press-rolls, a series of suction-boxes, an endless band of felt passing over said suctionboxes and through said rolls and means for initially depositing the materials to be employed on the upper section of said, endless felt, said means comprising a distributingtrough, a graduated sluiceway therein, approximating in and conveying means from said sluiceway to the upper section of the endless felt.

3. In a machine for making millboard and similar substances, the combination of a pair of press-rolls, a series of suction-boxes, an endless band-of felt passing over saidsuctionboxes and through said rolls and means for initially depositing the material to be employed on the upper section of said endless IIO length the width of thefelt,

the sluiceway to a point over the felt, said means comprising a distributingtrough, a graduated sluiceway therein, an agitator in the trough located adjacent to the-sluiceway, and an apron extending from upper section' of the endless felt.

4. In a machine for making millboard and similar substances, the combination of a pair of press-rolls, a series of suction-boxes, an endless band of felt passing over said suctionboXes and through said rolls and means for initially depositing the material to be employed on the upper section of said endless felt, said means comprising a distributingtrough, a graduated sluiceway therein, an agitator in the trough located adjacent to the sluiceway, and an apron extending from the sluiceway to a point over the upper section of the endless felt, said apron having upturned sides spaced apart a distance equal to the width of the web to be formed.

5. In a machine for making millboard and similar substances, the combination of a pair of ress-rolls, a series of suction-boxes, an en less band of felt passing over said suctionboxes and through said rolls and means for initially depositing the materials to be employed on the upper section of said endless felt, together with a distributing-roll located over the felt near the point where the material is delivered to it.

6. In a machine for making millboard and similar substances, the combination of a pair of press-rolls, a series of suction-boxes, an endless band of felt passing over said suctionboXes and through said rolls and means for initially depositing the materials to be employed felt, together with a distributing-roll located over the felt near the point where-thematerial is delivered to it,said roll revolving in a direction to produce circumferential travel on its under side opposite to the travel of the felt at the point of contact therewith. 7. In a machine for making millboard and similar substances, the combination of a pair of press-rolls, a seriesof guide-rolls, an endless band of felt passing around said guiderolls and through said press-rolls, means for initially depositing the materials to be em ployed on the upper section of said endless felt, and means disposed between the point of such deposit and the press-rolls for ,re-'

moving surplus water from the materials.

8. In a machine for making millboard and similar substances, the combination of a air of press-rolls, a series of guide-rolls, an en ess band of felt passing over said guide-rolls and throughsaid press-rolls, and means for initially depositing the materials to be employed on the upper section of said endless elt, said means comprising a distributingtrough, a graduated sluicewa therein, a p'roximating in. length the wirfth of the fe t, and conveying means extending from said on the upper section of said endless similar substances, the combination of 9. In a machine for making millboard and slmilar substances, the combination of a pair of press-rolls, a series of guide-rolls, an endless band of felt passing over said guide-rolls and through said press-rolls, and means for initially depositing the materials to be employed on the upper section of said endless felt, together with a distributing-roll located over the felt near the point where the material is delivered to it.

10. In a machine for making millboard and similar substances, the combination of a pair of press-rolls, a series of guide-rolls, an endless band of felt passing over said guide-rolls and through said press-rolls and means for initially depositing the materials to be employed on the upper section of said endless felt, together with a distributing-roll located over the felt near the point where the material is delivered to it, said roll revolving in a direction to produce circumferential travel on its under side opposite to the travel of the felt at the point of contact therewith.

11. In a machine for making millboard and similar substances, the combination of a pair of press-rolls, a series of guide-rolls, an endless band of felt passing rolls and between said ress-rolls, means for initially depositing a m of pulped fiber on said endless felt and separate means for depclisiting a solution of cement on said endless 12. In a machine for making millboard and similar substances, the combination of 'a pair of press-rolls, a series of guide-rolls, an endless band of felt passing around said guiderolls and between said press-rolls, means for depositing a film of pulped fiber on said end less felt and separate means for initially de positing a solution of cement on said endless elt, together with meansdisposed between the point of such deposit and the press-rolls for removin surplus water from the materials on the elt.

13. In a machine for making millboard and similarsubstances, the combination of a pair of press-rolls, a series of guide-rolls, an endless band of felt passing around said uiderolls and between said press-rolls, a distrib- ,uting-trough for fibrous pulp having a graduated sluiceway long as the felt is wide, an

therein, approximately as apron extending downward from said sluiceway to said felt, a

distributing-tank for a cement solution havin a similar sluiceway therein, and a second apron extending downward from said lastmentioned sluiceway to a point over the lower end of the first-mentioned apron.

14. In a machine for making millboard and a pair of press-rolls, aseries of guide-rolls, an endless band of felt passing around said 'derolls and between said press-rolls, a distribaround said guide- IIS uting-trough for fibrous pulp having a graduated sluiceway therein, approximately as long as the felt is wide, an apron extending downward from said sluiceway to said felt, a

distributing-tank for a cement solution having a similar sluiceway therein, and a second apron extending downward from said lastmentioned sluiceway to a point over the lower end of the first-mentioned apron together with a distributi g-roll upon which one apron discharges While the other discharges under said rolls.

15. In a machine for making millboard and similar substances, the combination of a pair distributing-tank for a cement ing a similar sluiceway therein, and a second apron extending downward from said lastmentioned sluiceway to a pointover the lower end of the first-mentioned apron, together with a distributing-roll upon which one apron discharges while the other dischar es under said roll, and a series of suctionoxes located between the distributingroll and the press-rolls and over which the felt passes.

16. The combination of the mixin box, the distributing-trou h, the submer e passage-way between t em, the ove oW-box beside the mixing-box, the stock-chest, a pump and connections for drawing the stock from the stock-chest and discharging it into the mixing boig'and an overflow-pi e leading from the overflow-box to-the stoc -chest.

Signed at Brooklyn, New York, this 3d day of April, 1906.

Witnesses:

D. L. THOMPSON, J. SCHAEFER, Jr.

WILLIAM SILLMAN: 

